Fuel-feeding device.



PATENTED MAY 5, 1903.

No. 727,305., I L. K. DAVIS.

FUEL FEEDING DEVICE.

APPLICATION FILED MAR. 12. 1902.

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PATENTED MAY 5, 1903. L. K. DAVIS. FUEL FEEDING DEVICE.

APPLICATION EILED MAR. 12, 1902. y

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No. 727,305 PATENTED MAY 5, 1903. L. K. DAVIS.

FUEL FEEDING DEVICE.

APPLICATION FILED MAB. 12.1902.

140 MODEL.

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PATENT OFFICE.

LEWIS K. DAVIS, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO GRACE P.

DAVIS, OF'INDIANAPOLIS, INDIANA. v

FUEL-FEEDING DEVICE.

SPECIFICATION forming part of Letters Eatent No. 727,305, dated May 5, 1903.

Application filed March 12,1902. Serial No. 97,877. (No model.)

To to whom it may concern:

Be it known that I, LEWIS K. DAVIS, of Indianapolis, Indiana, have invented new and useful Improvements in Fuel-Feeding Devices, of which the following is a specification.

My invention relates to fuel-feeding devices for furnaces, but more particularly to apparatus for continuously feeding fine fuel, as coal or coke, coal-dust, and the like.

The object of my invention is to improve upon the apparatus hitherto employed for forcing fuel into furnaces and distributing it therein through the agency of fluid under pressure, as air or steam, acting through fuelfeeding devices, such as nozzles.

My invention consists, primarily, in devices and apparatus for carrying out the above objects; and it further consists in the apparatus hereinafter more fully described and shown in its many details of construction and operation in the accompanying specification and drawings, in which- Figure l is a side view, partly in section, of my improved fuel-feeding device shown in connection with a furnace. Fig. 2 is a front elevation of the apparatus. Fig. 3 is an enlarged longitudinal partly-sectional View of the nozzle. Fig. 4: is a plan view of the nozzle on the line 'g y of Fig. 3. Fig. 5 is a detail View showing the sliding plate through which the nozzle projects, and Fig. 6 is a sectional View of the nozzle on line on a: of Fig. 3.

Referring to the drawings, a represents a suitable furnace, in connection with which myimprovedfuel-feeding apparatus is shown, in this instance'arranged in front of the furnace; but it may be arranged in any desire position relative thereto.

As hereinbefore stated, my invention relates to the feeding of fuel through a nozzle or nozzles, the fuel being injected into the furnace through the action of fluid under pressure, and 0 represents a nozzle, but one being illustrated in this instance, and means are provided for conveying fuel and fluid under pressure thereto. A suitable hopper b is arranged in any convenient position relative to the furnace, and connection is made between the nozzle and the hopper, as by piping d, while means are provided, shown as a flexible hose e, for leading fluid under pressure, as compressed air, to the nozzle to force the fuel into the furnace. Within the connection or casing 5, connecting piping d with the hopper, may be arranged suitable means, such as the Walker patent mixer, which 0pcrates with fluid under pressure for mixing the fuel, and piping 6 is provided for leading compressed air to the mixer. As this is no part of my invention, however, it is deemed unnecessary to further illustrate the mixer. The nozzle 0, according to my invention, is so supported relative to the furnace that it may be adjusted vertically, or, in other words, the nozzle itself may be bodily moved vertically relative to the furnace, and in order to secure this operation any suitable means may be provided. As shown, guides h h are arranged on the frontof the furnace, provided with grooves f, in which a frame g is adapted to slide vertically and through an opening 7, in which frame the nozzle 0 projects. The flexible hose e allows vertical movement of the nozzle without injury to the fluid-pressure connections, and in this instance the piping cl, connecting the hopper b with the nozzle, is made in telescoping sections, as shown, the section 2' telescoping within the section j, a suitable stuffing-box is preventing leakage, while arms Z and m, connected in any suitable manner to the frame g, serve to support the sectionjof the piping (1. As shown, a bracket 11, connected to the frame of the hopper, aids in supporting the upper section 1' of the piping, (Z.

By the arrangement described the nozzle 0 may be adjusted at'the desired height relative to the furnace for delivering fuel thereto, and any suitable means may be provided for so adjusting or raising and lowering the nozzle, in this instance manual means for raising and lowering being provided.

It is particularly desirable to be able to direct the discharge of fuel to different portions of the furnace, and according to my invention means are provided for directing the jet of fluid under pressure and fuel at any desired angle within certain limits. This is preferably accomplished by means of a universal joint or connection for the nozzle. A suitable and convenient construction is that shown in the drawings, wherein the section j of piping d is curved at its lower end, as at o, and provided with a spherical portion 19. The nozzle 0 is then connected to the pipe-sectionj in such manner that it may be turned in anydesireddirection. In this instance a socket 7", shown as comprising two portions suitably connected to each other, is arranged upon the spherical portion 10 of pipe-section j, while, as shown, the nozzle 0 is removably attached to the socket r by means of a screwthreaded portion g. In order to move the nozzle as desired upon this universal joint or connection formed by the spherical portion 19 of pipe-section j and socket 7', any suitable means may be provided; but as illustrated in my invention handles 8 are shown connected to the socket r at the sides thereof, these handles 8 extending in such direction relative to the piping and'the socket 7 that the desired play of the nozzle may be had. In order to fix the nozzle in any desired angular position, in this instance sectors 25 are arranged connected to the pipe-sectionsj, and adjustingpins 11., adjustably connected to the handles 3, are adapted to holes in the sec tors t.

' The nozzle itself is devised to aid in mixing the fuel and in uniformly distributing it throughout the furnace as desired, and, as shown, rifllng in the form of spiral ribs or blades 0 is provided within the nozzle, and while the pitch of these spirals may be of any desired degree Ihave found that a half a turn of the spiral with substantially the length of nozzle shown operates efficientl y and well and is suitable for the purpose of my invention. As the fuel passes downward from the hopper 1) to the nozzle 0 it is acted upon by the fluid under pressure entering through the hose 6, as shown, connected at the-rear of the nozzle 0, and a whirling motion as it passes through the nozzle is given to the fuel by means of the spiral blades 1). This whirling or rotary motion given to the fuel by its discharge through the nozzle operates to distribute the fuel in a-cloud within the furnace instead of in the form of a compact jet, as in the ordinary nozzle.

According to my invention I am able to distribute the fuel much more evenly throughout the furnace and to obtain a better mixing of the fuel than in an apparatus of this class hitherto devised, for it will be seen that means are not only provided for spreading the fuel, but the direction of discharge may be adjusted at any desired angle, and combined with this the height of the nozzle relative to the furnace may be altered.

Without limiting myself to the precise details of construction shown and described, I claim as my invention- 1. In a fuel-feeding device, the combination of a furnace, a fuel-supply pipe having a ballshaped end arranged at the entrance of the furnace, a nozzle having a socket fitting over the said ball-shaped end, and handles connected to said nozzle and extending outside the furnace, substantially as set forth.

2. In a fuel-feeding device, the combination ofa furnace, a frame supported for movement vertically in front of the furnace, a fuel-supply pipe supported on said frame to move vertically with it, and a nozzle having a universal-joint connection with the pipe, said nozzle extending into the furnace, substantially as set forth.

3. In a fuel-feeding device, the combination of a furnace, a frame supported for movement vertically in front of the furnace, a fuel-supply pipe supported on said frame to move vertically with it, a nozzle having a universaljoint connection with the pipe, said nozzle extending into the furnace, and means exterior of the furnace for adjusting the angle of the nozzle within the furnace, substantially as set forth.

4:. In a fuel-feeding device, a universallyadjustable fuel-feeding nozzle, having a removable end portion secured thereto, said end portion being formed or provided with spiral blades extending continuously substantially the length of the nozzle on the interior thereof, and so constructed that a central longitudinal continuous opening is provided forming the bore of said nozzle, substantially as set forth.

5. In a fine-fuel-feeding device, the combination of a furnace having an enlarged opening, a frame supported to move vertically in front of the furnace, a universally-adjustable nozzle having a removable end portion supported by the frame to move bodily therewith within said opening, and telescopic fuel-supply pipes connected to said nozzle, substantially as set forth.

6. In a fine-fuel-feeding device, the combination of a furnace, a frame supported to move vertically in front of the furnace, a universally-adjustable discharge-nozzle supported by the frame to move bodily therewith and having a removable end portion extending into the furnace, telescopic fuel-supply pipes connected to said nozzle, and another pipe for delivering fluid under pressure to said nozzle, substantially as set forth.

7. In a fine-fuel-feeding device, the combination of a furnace, a hopper for fine fuel, a frame supported to move vertically in front of the furnace, a fuel-supply pipe and a discharge-nozzle supported by the frame to move vertically with it and extending into the furnace, and a fuel-supply pipe connected with the hopper and to which the pipe on the frame is telescopically connected, substantially as set forth.

8. In a fine-fuel-feeding device, the combination of a furnace, a hopper for fine fuel, a frame supported to move vertically in front of the furnace, a fuel-supply pipe and a discharge-nozzle supported by the frame to move vertically with it and extending into the furnace, a pipe connected to said fuel-supply pipe and nozzle to deliver fluid under pressure thereto, and a fuel-supply pipe connected with the hopper and to which the pipe on the frame is telescopically connected, substantially as set forth. l cover and independently thereof in any di- 9. In a fine-fuel-feeding device, the comhil rection, substantially as set forth.

nation with a furnace having an enlarged I Signed this 27th day of February, 1902, at

to the supply-pipe and projecting through the opening into the furnace and adapted to be adjusted vertically upon movement of the opening and a hopper for fine fuel, of a verl Indianapolis. tically-moving ad jnstabie cover for said opening, a telescopic pipe connected with the hopl l LEWIS K. DAVIS.

per for supplying fuel, part thereof secured to said cover and moving bodily therewith, and a universally-adjustable nozzle secured Witnesses:

EDWARD O. LEIBLE, CLEMENS BLANK. 

